KR20190055652A - Portable Brake for Wheel Chair - Google Patents

Abstract

Provided is a portable brake for a wheelchair. The portable brake for a wheelchair includes: a control box including a stop handle mounted on a wheelchair frame; a brake part mounted on the rotary shaft of a rear wheel of a wheelchair; and a connection bar delivering linear movement to the brake part in accordance with the movement of the stop handle of the control box. The brake part includes: a guide frame (a); a moving bar (b) installed in the guide frame, and partially connected with an end of the connection bar to be linearly moved in the guide frame due to the linear movement delivered through the connection bar; a first rotary part (c) placed with its upper surface touching the moving bar, and having both ends rotated up and down around a first pivot in the center in accordance with the linear movement of the moving rod; a pair of vertical pressing protrusions (d) placed on both sides of the lower surface of the first rotary part, and elastically moved up and down by a compressing spring; a second rotary part (e) placed in the lower part of the vertical pressing protrusions, and having both ends rotated up and down around a second pivot in the center in accordance with the pressing movement of one of the vertical pressing protrusions; and a rotary gear (f) having the center of the inside fixed to the operating shaft of the rear wheel of the wheelchair and, and placed under the second rotary part to make both ends of the lower surface of the second rotary part selectively combined with sawteeth in accordance with the rotation of the second rotary part. Therefore, the present invention is capable of enabling a wheelchair to be stopped without much power during the movement of the wheelchair.

Description

[0001] The present invention relates to a portable brake for a wheelchair,

The present invention relates to a wheelchair brake, and more particularly, to a detachable wheelchair brake which can be easily stopped by adjusting a knob in a ramp.

A wheelchair is a device equipped with a chair and a wheel so that the disabled person, the patient, or the elderly can move while sitting. In general, a wheelchair includes a pipe-shaped support frame, a seat mounted on the upper side of the frame to seat the occupant, a drive wheel that is rotatably installed on both lower sides of the frame and rolls in contact with the ground during running, And a handle that is installed outside the driving wheel and rotates the driving wheel by the hand of a passenger by rotating the auxiliary wheel when the driver touches the ground.

The wheelchair is classified into a manual type in which the user rides with his / her own strength or a protector is pushed according to the operation mode, and an electric type wheelchair is driven with the electric power charged in the battery. Electric wheelchairs are useful for elderly people as well as patients with uncomfortable legs because they have a convenient advantage in that they can move on their own and have no power when driving.

In the case of a conventional manual or electric wheelchair, a separate braking device is not provided or a method of braking by frictional force in direct contact with wheel of the wheelchair has been proposed. In a wheelchair without a braking device, the user has to force the wheel to rotate directly, thereby restricting the rotational force of the wheel, so that the wheelchair must be stopped. Therefore, the user's upper body, especially the shoulders, elbows and wrists, In the case where the braking device is in direct contact with the outer circumferential surface of the wheel to limit the rotation of the wheel (for example, the registered utility model 20-0116164) even when there is the braking device, strong force is still required for the user, Braking is difficult.

In the case of using the disk system used for braking the vehicle as the other braking means (Patent Document 10-2017-0050819), when the braking operation is performed automatically in the ramp by using the tilt sensor and the speed sensor (Japanese Patent Laid-Open No. 10-2014-0030522 However, there is a disadvantage that the user still needs a force for braking or a complicated part such as a motor and a sensor is required for braking operation.

Accordingly, there is a demand for a new wheelchair brake device in which the force required for the user is reduced. In addition, the wheelchair needs to be kept stationary even in the inclined road including the uphill and downhill as well as the flat wheel, and in this case, a brake system for a wheelchair which can braked easily is also demanded.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a wheelchair brake capable of stopping a wheelchair without applying a large force.

Another object of the present invention is to provide a wheelchair brake which is easy to stop in a ramp including uphill and downhill.

It is still another object of the present invention to provide a wheelchair brake which can be easily mounted on a new wheelchair as well as a conventional wheelchair to be used as a stopping means.

Other objects and technical features of the present invention will be more specifically described in the following detailed description.

According to an aspect of the present invention, there is provided a control apparatus for a wheelchair, comprising a control box including a stop handle mounted on a wheelchair frame, a brake unit mounted on a wheel rear wheel rotation axis, A guide frame mounted in the guide frame and being partially connected to one end of the connecting rod and being linearly transmitted through a connecting rod, C) a first pivoted portion disposed so that the upper surface of the movable bar is in contact with the pivots, both ends of which are rotated up and down by a linear movement of the moving rod with the first pivot as a pivot axis, and d) And a pair of vertically arranged elastic members arranged on both sides of the lower surface of the one- And e) a pair of vertical pushing projections disposed at the lower portion of the pair of vertical pushing projections, respectively, and a second pivot as a pivoting axis, And a second rotating part rotatably mounted on the rear wheel drive shaft of the wheelchair and having an inner center fixed to a rear wheel drive shaft of the wheelchair, The portable brakes for a wheelchair according to the present invention include:

In the present invention, it is preferable that the upper surface of the first rotary part is formed in a concave curved V-shape downward.

In addition, the lower surface of the second rotary part may be formed in a concave semicircular shape so that the lower left and right sides may be divided into a first stopping part and a second stopping part, respectively. In this case, the portable brakes of the present invention control the stopping operation of the wheelchair in the ramp through different operations on the uphill and downhill.

More specifically, a linear movement of the connecting rod is generated by the forward and backward movement of the stop handle, and the moving rod is moved backward in the guide frame in the uphill road so as to rotate the first turning portion to press the first pushing projection, The first stopping part of the second rotating part fixes the rotating gear and the moving rod is moved forward in the guide frame on the downward path to rotate the first rotating part to press the second pressing stone, The second rotating portion rotates the second rotating portion, and the second rotating portion of the second rotating portion fixes the rotating gear.

The present invention may further include a hemispherical fixed end disposed between the lower portion of the second rotary portion and the rotary gear, wherein a second portion of the second rotary shaft is provided between the second lower portion and the hemispherical fixed portion, It is preferable that tensile springs are respectively inserted into both sides of the pivot.

According to the present invention, a rectilinear motion of a connecting rod is generated by a backward movement of a stationary handle, so that a disabled person, an elderly person or a patient who is inconvenient in motion can exert a stopping motion while moving the wheelchair without exerting a strong force through the upper body muscle such as the wrist or shoulder .

The portable brake of the present invention controls the rotation stopping operation of the rear wheel of the wheelchair by varying the linear motion and the rotational motion in multiple stages, and in particular, the stopping operation of the wheelchair is controlled in the ramp through different operations on the uphill and downhill, Soft release is possible when resuming.

The portable brakes of the present invention are preferably installed as a basic option in a wheel chair manufactured in the past. However, the portable brakes of the present invention may be detachably mounted on various types of wheelchairs in place of or in addition to the conventional brakes for directly contacting the wheelchair tires.

1 is a perspective view of a wheelchair equipped with a brake according to the present invention;
Figure 2 is a perspective view of an overview of a removable wheelchair brake;
3 is a perspective view of the brake main part
4 is a front view of the brake main part
Figure 5 is a perspective view of the break-
6 is a front view showing the brake first operation
7 is a partially enlarged view showing the brake second operation
Figs. 8A and 8B are schematic views showing a brake operation in an ascending slope and a descending slope

The present invention proposes a brake for a wheelchair which is easily controlled in a ramp to stop operation without a large force and is detachable. By controlling the rotation of the rear wheel of the wheelchair by switching the linear motion and the rotational motion in multiple stages, it is possible to easily stop the wheelchair especially in the uphill or downhill, and it is also easy to release in the stopped state.

Fig. 1 shows a wheelchair 100 equipped with a brake according to the present invention, and Fig. 2 schematically shows a portable brake for a wheelchair. The portable brake 200 includes a control box 210, a brake unit 220, and a connecting rod 215. The control box includes a stop handle 211, And linear motion is transmitted to the brake portion through the connecting rod according to the movement.

The control box may be mounted, for example, on the wheelchair frame 120 so that the user can hold the stop handle while the wheelchair user is sitting on the wheelchair to control the stopping operation. The braking portion may be mounted on the wheelchair rear wheel turning shaft 110, for example. More specifically, as will be described later, the rotary gear of the brake portion is fixedly mounted on the rear wheel pivot shaft, and the remaining components can be partially fixed to the frame of the wheelchair as needed.

The structure and function of the main components of the brake portion will be described with reference to Figs. 3 to 5. Fig. The brake unit for controlling the rotation of the rear wheel of the wheelchair includes a guide frame 221, a moving rod 222, a first rotary unit 223, a pair of vertical pressing projections 224, a second rotary unit 225, And a rotary gear 228.

The guide frame 221 is, for example, a quadrangular frame structure in which the inside is hollow, and the upper and lower surfaces of the guide frame 221 serve as guides for guiding back and forth movement of the moving rod. The moving rod 222 is mounted in the guide frame, and is linearly moved in the guide frame by a linear movement partially connected to one end of the connecting rod and transmitted through the connecting rod.

The moving rod is formed with a rail wheel 222b which is coupled to the upper surface and the lower surface of the inside of the guide frame. One end of the moving rod comes off the guide frame in a bar shape and contacts the upper surface of the first turning portion. And a connection part 222a which is detached from the guide frame and is engaged with or integral with the connecting rod is provided.

The first rotary part 223 is disposed below the moving rod, and the lower surface of the moving rod and the upper surface of the first rotary part are in contact with each other. The first pivot 223a of the first pivot 223a serves as a pivot, and the first pivot 223a of the first pivot 223a serves as a pivot. So that it rotates up and down.

A pair of vertical pressing projections 224 are disposed on both sides of the lower surface of the first rotary part. The vertical pushing protrusion is elastically moved upward and downward by the compression spring 224a, and one of the pair of vertical pushing protrusions is selectively urged by one of both ends of the first pivoting portion in accordance with the rotation of the first pivoting portion .

A second rotary part 225 is disposed below the pair of vertical pressing projections. The second rotating portion rotates both ends up and down by a pressing operation of the pair of vertical pressing projections with the second pivot at the center (see 225a in FIG. 7) as a rotation axis. It is preferable that the upper surface of the second turning part is formed as a flat surface while the lower surface of the second turning part is formed as a concave semicircular shape. In this case, the lower surface of the second rotary part is divided into a first stopping part and a second stopping part, respectively, and the first and second stopping parts are selectively inserted into the rotary gear as described later, The rotation is stopped.

The pair of vertical pushers may be fixed to the lower surface of the first turning part or may be fixed to the upper surface of the second turning part.

The first pivot of the first rotary part and the second pivot of the second rotary part are mounted on a frame or the like near the rear wheel of the wheelchair so that the first rotary part and the second rotary part can stably It is preferable to fix it.

The rotary gear 228 is disposed at the lower portion of the second rotary portion with its inner center empty and the gear center 228a fixed to the rear wheel drive shaft of the wheelchair. Both ends of the second turning portion are selectively coupled to the teeth of the rotating gear in accordance with the rotation of the second turning portion. To fix the rotary gear, a plurality of fixing bolts 229 may be coupled to the center of the gear.

In the present invention, a hemispherical fixed end 226 may be further disposed between the lower portion of the second rotary portion and the rotary gear to smooth the returning operation of the second rotary portion to its original state after rotation and rotation. In this case, it is preferable that tension springs (see 227a and 227b in Fig. 7) are inserted into both sides of the second pivot of the second pivot shaft on both sides between the second pivot lower surface and the hemispherical fixed end. The hemispherical fixed end is formed to be larger than the curvature of the semicircular curved surface of the second rotationally lower surface and can be fixed to the wheelchair frame or the like while partially contacting or spaced from the second rotationally facing lower surface.

A portable braking device for a wheelchair according to the present invention is a wheelchair portable braking device that converts a linear motion into a rotational motion by an operation of a user moving a knob in a state of being mounted on a wheelchair and converts the rotational motion into a second rotational motion through a linear motion, And controls the rotation of the rotary gear for stopping. This control operation will be described in more detail with reference to FIGS. 6 and 7. FIG.

Fig. 6 shows the brake first operation. The user moves the moving rod through the connecting rod by pulling or pushing the handle of the control box. The moving rod 222 moves forward (M12) or rearward (M11) in the guide frame. When the handle is moved backward by pulling the handle, the first turning portion 223 is rotated counterclockwise (R11) The protrusion 224L is pushed. In contrast, when the movable bar is moved forward by pushing the handle, the first pivot portion is rotated clockwise (R12) to push the second pushing protrusion 224R.

In the first operation, the linear motion transmitted to the handle, the connecting rod, and the moving rod causes the rotation of the first rotary part, and the linear motion of the first pressing protrusion or the second pressing protrusion, .

Fig. 7 shows the second brake operation. The second pivoting portion is rotated clockwise or counterclockwise by the vertical pushing protrusion selectively vertically moved by the first pivoting portion. For example, when a force is applied to the first pressing projection 224L, the second rotating portion is rotated in the counterclockwise direction (R21) so that the first stopping portion 225b1 of the second rotating portion rotates in the inter- When the force is applied to the second pressing projection 224R, the second rotary part is rotated clockwise (R22), and the second stopping part 225b2 of the second rotary part is rotated Is inserted into the inter-tooth space 228b of the rotary gear to fix the rotary gear.

In the second operation, the linear motion is generated by the rotation transmitted from the first rotary part and the pushing projection again generates the rotational motion of the second rotary part, so that the first stop of the second rotary part or the second rotary part of the second rotary part The stopper selectively restrains the teeth of the rotary gear.

Such conversion of linear motion and rotational motion and selective tooth restraint of the second rotary part are also useful for stopping the wheelchair in the flat area, but they are particularly effective in stopping the wheelchair in the ramp.

Figures 8a and 8b show the braking action at ramp up and down ramp. The portable brake of the present invention controls the stopping operation of the wheelchair in the ramp through different operations on the uphill and downhill.

8A, the moving rod is moved backward in the guide frame by moving the stop handle backward to cause linear motion of the connecting rod. As a result, the first pivoting portion is rotated to push the first pushing pivot , The first pushing-out gear rotates the second rotary part in the counterclockwise direction (R21), and the first stopping end (225b1) of the second rotary part fixes the rotary gear.

In such a ramp, the wheel of the wheelchair is forced to rotate counterclockwise along the ramp. In the wheelchair brake of the present invention, the left lower portion of the second rotary portion, that is, the first stationary end is fastened to the rotary gear at the ascending inclination, so that the contact brake between the rotary stop and the first stationary end can do. On the other hand, when the right lower portion of the second rotating portion, i.e., the second stopping portion, restrains the rotating gear in the ascending slope, the first rotating portion is difficult to separate due to the force to rotate counterclockwise by gravity, It becomes difficult to release it from the state.

On the other hand, in the downward direction as shown in FIG. 8B (the linear motion of the connecting rod is generated by pushing the stop handle forward), the moving rod is moved forward in the guide frame so that the first turning part is rotated, And the second pushing device rotates the second rotary part clockwise (R22), and the second stopping part 225b2 of the second rotary part fixes the rotary gear.

In such a downward slope, the wheel of the tether is forced to rotate clockwise along the ramp. The lower right portion of the second tumbler, i.e., the second tumbler, is fastened to the rotary gear to release the lock It is possible to separate while minimizing the contact friction between the rotary gear and the second stopping end.

This stopping operation can be similarly performed even if the portable brake of the present invention is mounted on the right wheel of the wheelchair or the left rear wheel.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Modified, modified, or improved.

100: wheelchair 110: rear wheel rotation shaft
120: Wheelchair frame 200: Portable brake
210: control box 211: stop handle
215: connecting rod 220:
221: guide frame 222: moving rod
222a: connection part 222b: rail wheel
223: first pivot 223a: first pivot
224L, 224R: vertical pressing protrusion 224a: compression spring
225: second east portion 225a: second pivot
225b1: First stop 225b2: Second stop
226: Fixed ends 227a, 227b: Tension spring
228: Rotating gear 228a: Gear center
229: Fixing bolt

Claims (5)

A control box including a stop handle mounted on the wheelchair frame,
A brake portion mounted on the wheel rear wheel turning shaft, and
And a connecting rod for transmitting linear motion to the brake unit in accordance with the movement of the stop handle of the control box,
The brake unit
a) a guide frame,
b) a movable bar mounted in the guide frame and linearly moved in the guide frame by linear motion partially connected to one end of the connecting rod and transmitted through the connecting rod,
(c) a first pivotal portion disposed with its top surface in contact with the moving rod, both ends of which are rotated up and down by a linear movement of the moving rod with the first pivot as a pivoting axis,
d) a pair of vertical pushing projections arranged on both sides of the lower surface of the first pivoting portion and elastically moving up and down by a compression spring,
e) a second pivoting portion disposed at a lower portion of the pair of vertical pushing projections and having both ends pivoted up and down by a pressing operation of the pair of vertical pushing projections with the central second pivot as a pivoting axis; ,
f) a rotary gear fixed to the rear wheel drive shaft of the wheelchair and disposed below the second rotary part so that both ends of the second rotary part are selectively engaged with the teeth, the inner center being fixed to the rear wheel drive shaft of the wheelchair,
Portable brakes for wheelchairs.
The method according to claim 1,
And the upper surface of the first turning portion is formed in a concave curved V-shape in a downward direction.
The method according to claim 1,
Wherein the second lower surface is formed in a concave semicircular shape so that lower left and right sides are divided into a first stop and a second stop, respectively.
The method of claim 3,
The moving rod is moved backward in the guide frame to rotate the first rotating part to push the first pushing pawl so that the first pushing pawl rotates the second pivoting part so that the first stopping end of the second pivoting part rotates Fixed,
The moving rod is moved forward in the guide frame to rotate the first pivotal portion to press the second pushrod, and the second pushrod rotates the second pivotal portion so that the second stopping portion of the second pivotal portion rotates the rotation gear And a locking member for locking the wheelchair.
The method according to claim 1,
A semi-spherical fixed end is further disposed between the lower portion of the second rotary part and the rotary gear, and a tension spring is provided on both sides of the second pivot of the second rotary shaft, Wherein the first and second engaging portions are engaged with each other.

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